This might be a stupid question (still I'm gonna test it first thing on Monday) but I wondered... The dashboard is flashing modded drives. What's the chance it's taking the key from the motherboard instead from the drive? I'm asking because this could be a way to fix consoles without keys.
The real reason that I'm asking is because I have a console with such problem, but I removed it's nand form some reason (don't ask why) and I don't know if it will start when I return it

(I didn't actually did it, so I don't know how good it was removed). Never mind that, the main idea is if it is possible, and if someone could test this hypothesis too, by dumping a drive (to save the original key), flashing it with FFs for a key and updating to the new dash (I figure some if you will be doing tests with the new dash, so I wanted to throw this test case in the mesh)
Very interesting! You may be on to something here. I wish i was a tester in this program now.